Additive relations A
Mathematics K–10 (2022) · Stage 2 · View this focus area on the NESA NSW Curriculum website ↗
Outcomes
MA2-AR-01 selects and uses mental and written strategies for addition and subtraction involving 2- and 3-digit numbersMA2-AR-02 completes number sentences involving addition and subtraction by finding missing valuesContent dot points
Each dot point has its own page with resources matched to it.
Use the principle of equality
- Recognise equal differences and record them in number sentences
- Use the equals sign to mean 'the same as', rather than to perform an operation
- Apply the associative property of addition to forming multiples of 10 (Reasons about relations)
Recognise and explain the connection between addition and subtraction
- Use number relation principles to solve related problems (Reasons about relations)
- Demonstrate how addition and subtraction are inverse operations
- Use the complement principle of addition and subtraction (Reasons about relations)
- Explain and check solutions to problems, including by using the inverse operation
Select strategies flexibly to solve addition and subtraction problems of up to 3 digits
- Apply known mental strategies that use partitioning to add and subtract, such as bridging the decades
- Use the compensation strategy to add and subtract (Reasons about relations)
- Apply the levelling and constant difference strategies (Reasons about relations)
- Represent solutions to addition and subtraction problems, including word problems, using an empty number line or bar model
- Compare and evaluate strategies used to solve addition and subtraction problems, reasoning which strategy may be most efficient
Represent money values in multiple ways
- Recognise the relationship between dollars and cents
- Represent equivalent amounts of money using different denominations
- Perform calculations with money, including finding change
Focus area resources
- Unit/PlanningAnnotated work samples – Stage 2, activity 1: additive relations
- Unit/PlanningAnnotated work samples – Stage 2, activity 2: additive relations
- Unit/PlanningTeaching advice – Stage 2: additive relations A strategies and vocabulary
Stage 2 planning resources
Stage- or course-wide documents (scope and sequences, guides) that cover this focus area alongside others.
- Unit/PlanningMaking connections – Stage 2 (parallel content)
- Unit/PlanningSample scope and sequence – Stage 2